398135 has 4 divisors (see below), whose sum is σ = 477768. Its totient is φ = 318504.

The previous prime is 398129. The next prime is 398143. The reversal of 398135 is 531893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 531893 = 41 ⋅12973.

It is a cyclic number.

It is not a de Polignac number, because 398135 - 2⁴ = 398119 is a prime.

It is a super-2 number, since 2×398135² = 317022956450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398098 and 398107.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398135.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39809 + ... + 39818.

It is an arithmetic number, because the mean of its divisors is an integer number (119442).

2³⁹⁸¹³⁵ is an apocalyptic number.

398135 is a deficient number, since it is larger than the sum of its proper divisors (79633).

398135 is an equidigital number, since it uses as much as digits as its factorization.

398135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79632.

The product of its digits is 3240, while the sum is 29.

The square root of 398135 is about 630.9793974450. The cubic root of 398135 is about 73.5659395606.

The spelling of 398135 in words is "three hundred ninety-eight thousand, one hundred thirty-five".